Page 489 - Practical Machinery Management for Process Plants Major Process Equipment Maintenance and Repair
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466 Major Process Equipment Maintenance and Repair
Figure 9-12. CW352 Control Panel (courtesy Westinghouse Canada).
designed for machines through the 60s and early 70s. They attempted to
achieve reliability through simplicity. In the 70s, solid state electronics
became popular for gas turbines. Digital and digitallanalog hybrid systems
(Figure 9-12) were developed. These systems allow much more flexibility at
the expense of simplicity. There is a continuing debate about whether added
complexity and redundancy provide reliability.
